LTC4068EDD-4.2 Standalone Linear Li-Ion Battery Charger

The LTC4068EDD-4.2 from Linear Technology is a highly efficient and compact standalone linear charger specifically designed for single-cell lithium-ion batteries. Its small footprint and simple external circuitry make it an ideal choice for portable applications where space is at a premium and simplicity is key.

This advanced charging solution comes in a low-profile (0.75mm) 3mm x 3mm DFN package, offering an optimal blend of thermal performance and device miniaturization. The LTC4068EDD-4.2 boasts an array of features that ensure the safe and reliable charging of lithium-ion batteries.

One of the key features of this charger is its preset 4.2V charge voltage with an accuracy of ±1%. This precise control helps maintain the longevity and stability of the battery. Additionally, the device offers programmable charge current up to 1A, which can be set by a single resistor, providing flexibility to work with various battery capacities and charging speeds.

The LTC4068EDD-4.2 also includes an automatic recharge feature, which initiates a new charging cycle if the battery voltage falls below a certain threshold, ensuring that the battery remains fully charged over time. Furthermore, the charger has a charge current monitor that allows for real-time observation of the charging process, which can be particularly useful for diagnostic and status reporting purposes.

Protection features are paramount in battery charging, and the LTC4068EDD-4.2 does not disappoint. It includes thermal regulation to maximize the charge rate without the risk of overheating, and it also has an overvoltage protection circuit that prevents the battery from being overcharged if an incorrect input voltage is applied.

For added convenience, the device does not require a separate power supply, as it can be powered directly from a USB port or an external power supply. This makes it incredibly versatile and easy to integrate into a wide range of applications, from handheld devices to personal electronics.

Overall, the LTC4068EDD-4.2 offers a robust and user-friendly solution for designers looking to implement a reliable and high-performance charging system into their lithium-ion battery-powered products.